CVE-2023-51764
Vulnerability from cvelistv5
Published
2023-12-24 00:00
Modified
2024-08-02 22:48
Severity ?
Summary
Postfix through 3.8.5 allows SMTP smuggling unless configured with smtpd_data_restrictions=reject_unauth_pipelining and smtpd_discard_ehlo_keywords=chunking (or certain other options that exist in recent versions). Remote attackers can use a published exploitation technique to inject e-mail messages with a spoofed MAIL FROM address, allowing bypass of an SPF protection mechanism. This occurs because Postfix supports <LF>.<CR><LF> but some other popular e-mail servers do not. To prevent attack variants (by always disallowing <LF> without <CR>), a different solution is required, such as the smtpd_forbid_bare_newline=yes option with a Postfix minimum version of 3.5.23, 3.6.13, 3.7.9, 3.8.4, or 3.9.
References
cve@mitre.orghttp://www.openwall.com/lists/oss-security/2023/12/24/1Mailing List, Third Party Advisory
cve@mitre.orghttp://www.openwall.com/lists/oss-security/2023/12/25/1Mailing List, Third Party Advisory
cve@mitre.orghttp://www.openwall.com/lists/oss-security/2024/05/09/3
cve@mitre.orghttps://access.redhat.com/security/cve/CVE-2023-51764Third Party Advisory
cve@mitre.orghttps://bugzilla.redhat.com/show_bug.cgi?id=2255563Issue Tracking, Third Party Advisory
cve@mitre.orghttps://fahrplan.events.ccc.de/congress/2023/fahrplan/events/11782.htmlTechnical Description
cve@mitre.orghttps://github.com/duy-31/CVE-2023-51764Exploit, Third Party Advisory
cve@mitre.orghttps://github.com/eeenvik1/CVE-2023-51764Exploit, Third Party Advisory
cve@mitre.orghttps://lists.debian.org/debian-lts-announce/2024/01/msg00020.html
cve@mitre.orghttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JQ5WXFCW2N6G2PH3JXDTYW5PH5EBQEGO/
cve@mitre.orghttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QRLF5SOS7TP5N7FQSEK2NFNB44ISVTZC/
cve@mitre.orghttps://lwn.net/Articles/956533/
cve@mitre.orghttps://sec-consult.com/blog/detail/smtp-smuggling-spoofing-e-mails-worldwide/Technical Description, Third Party Advisory
cve@mitre.orghttps://www.openwall.com/lists/oss-security/2024/01/22/1
cve@mitre.orghttps://www.postfix.org/announcements/postfix-3.8.5.html
cve@mitre.orghttps://www.postfix.org/smtp-smuggling.htmlExploit, Mitigation, Vendor Advisory
cve@mitre.orghttps://www.youtube.com/watch?v=V8KPV96g1ToExploit
af854a3a-2127-422b-91ae-364da2661108http://www.openwall.com/lists/oss-security/2023/12/24/1Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108http://www.openwall.com/lists/oss-security/2023/12/25/1Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108http://www.openwall.com/lists/oss-security/2024/05/09/3
af854a3a-2127-422b-91ae-364da2661108https://access.redhat.com/security/cve/CVE-2023-51764Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://bugzilla.redhat.com/show_bug.cgi?id=2255563Issue Tracking, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://fahrplan.events.ccc.de/congress/2023/fahrplan/events/11782.htmlTechnical Description
af854a3a-2127-422b-91ae-364da2661108https://github.com/duy-31/CVE-2023-51764Exploit, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://github.com/eeenvik1/CVE-2023-51764Exploit, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2024/01/msg00020.html
af854a3a-2127-422b-91ae-364da2661108https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JQ5WXFCW2N6G2PH3JXDTYW5PH5EBQEGO/
af854a3a-2127-422b-91ae-364da2661108https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QRLF5SOS7TP5N7FQSEK2NFNB44ISVTZC/
af854a3a-2127-422b-91ae-364da2661108https://lwn.net/Articles/956533/
af854a3a-2127-422b-91ae-364da2661108https://sec-consult.com/blog/detail/smtp-smuggling-spoofing-e-mails-worldwide/Technical Description, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://www.openwall.com/lists/oss-security/2024/01/22/1
af854a3a-2127-422b-91ae-364da2661108https://www.postfix.org/announcements/postfix-3.8.5.html
af854a3a-2127-422b-91ae-364da2661108https://www.postfix.org/smtp-smuggling.htmlExploit, Mitigation, Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://www.youtube.com/watch?v=V8KPV96g1ToExploit
Impacted products
Vendor Product Version
Show details on NVD website

To clipboard 

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Advisory\"]},{\"url\":\"https://lists.debian.org/debian-lts-announce/2024/01/msg00020.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JQ5WXFCW2N6G2PH3JXDTYW5PH5EBQEGO/\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QRLF5SOS7TP5N7FQSEK2NFNB44ISVTZC/\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://lwn.net/Articles/956533/\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://sec-consult.com/blog/detail/smtp-smuggling-spoofing-e-mails-worldwide/\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Technical Description\",\"Third Party Advisory\"]},{\"url\":\"https://www.openwall.com/lists/oss-security/2024/01/22/1\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://www.postfix.org/announcements/postfix-3.8.5.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://www.postfix.org/smtp-smuggling.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Exploit\",\"Mitigation\",\"Vendor Advisory\"]},{\"url\":\"https://www.youtube.com/watch?v=V8KPV96g1To\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Exploit\"]}]}}"
  }
}


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Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.